EP2635044A3 - Echounterdrückung - Google Patents

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Info

Publication number
EP2635044A3
EP2635044A3 EP13153440.6A EP13153440A EP2635044A3 EP 2635044 A3 EP2635044 A3 EP 2635044A3 EP 13153440 A EP13153440 A EP 13153440A EP 2635044 A3 EP2635044 A3 EP 2635044A3
Authority
EP
European Patent Office
Prior art keywords
transistor
microphone
electret element
gate terminal
echo cancellation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13153440.6A
Other languages
English (en)
French (fr)
Other versions
EP2635044A2 (de
Inventor
Joakim Eriksson
Jonny Strandh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Mobile Communications AB
Original Assignee
Sony Mobile Communications AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Mobile Communications AB filed Critical Sony Mobile Communications AB
Publication of EP2635044A2 publication Critical patent/EP2635044A2/de
Publication of EP2635044A3 publication Critical patent/EP2635044A3/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45076—Indexing scheme relating to differential amplifiers the resulting deducted common mode signal being added to or controls the differential amplifier, and being a current signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45082—Indexing scheme relating to differential amplifiers the common mode signal being taken or deducted from the one or more outputs of the differential amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45084—Indexing scheme relating to differential amplifiers the common mode signal circuit comprising one or more inductive or capacitive elements, e.g. filter circuitry
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45088—Indexing scheme relating to differential amplifiers the resulting deducted common mode signal being added to or controls the differential amplifier, and being a voltage signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)
EP13153440.6A 2012-03-02 2013-01-31 Echounterdrückung Withdrawn EP2635044A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/410,677 US8965013B2 (en) 2012-03-02 2012-03-02 Echo cancellation

Publications (2)

Publication Number Publication Date
EP2635044A2 EP2635044A2 (de) 2013-09-04
EP2635044A3 true EP2635044A3 (de) 2015-01-14

Family

ID=47632884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13153440.6A Withdrawn EP2635044A3 (de) 2012-03-02 2013-01-31 Echounterdrückung

Country Status (2)

Country Link
US (1) US8965013B2 (de)
EP (1) EP2635044A3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9148729B2 (en) 2012-09-25 2015-09-29 Invensence, Inc. Microphone with programmable frequency response

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414433A (en) * 1980-06-20 1983-11-08 Sony Corporation Microphone output transmission circuit
EP2270979A1 (de) * 2009-06-30 2011-01-05 STMicroelectronics Srl Vorverstärkerschaltung für mikroelektromechanischen kapazitiven akustischen Wandler

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7787642B2 (en) * 2003-07-17 2010-08-31 Massachusetts Institute Of Technology Low-power high-PSRR current-mode microphone pre-amplifier system and method
KR20060113925A (ko) * 2003-10-14 2006-11-03 아우디오아시스 에이/에스 마이크로폰 전치 증폭기
US8644529B2 (en) * 2009-10-13 2014-02-04 Cad Audio, Llc Fully differential low-noise capacitor microphone circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414433A (en) * 1980-06-20 1983-11-08 Sony Corporation Microphone output transmission circuit
EP2270979A1 (de) * 2009-06-30 2011-01-05 STMicroelectronics Srl Vorverstärkerschaltung für mikroelektromechanischen kapazitiven akustischen Wandler

Also Published As

Publication number Publication date
EP2635044A2 (de) 2013-09-04
US8965013B2 (en) 2015-02-24
US20130230183A1 (en) 2013-09-05

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